Chicago Fire‘s crossover episodes are a cornerstone of the One Chicago family — and Chi-Hards can’t get enough.
The One Chicago universe is a captivating smash, and as Chi-Hards keep coming back for more, One Chicago crossover episodes remain some of the most memorable moments in the franchise’s history.
Combining the casts of the flagship Chicago Fire, Chicago Med, and Chicago P.D., One Chicago crossovers weave together the challenges of the city’s most dedicated rescuers, creating a pulse-pounding narrative. These episodes not only raise the bar for twists and turns, but deepen the bonds between fan favorites across each show. Firehouse 51 never hesitates to run into danger alongside P.D.’s Intelligence Unit, and they’d never discount the critical role the Chicago Med nurses and doctors play when the ash finally settles. Every so often, the going gets so tough that Law & Order: Special Victims Unit‘s Olivia Benson (Mariska Hargitay) receives a call from Chicago for backup.
The One Chicago crossover episodes have become a cherished fixture within Dick Wolf’s sprawling franchise. Here is a guide to every essential One Chicago crossover episode that delivers those high-octane thrills — official episode synopsis included.
Must-See crossover Episodes of Chicago Fire, Chicago Med, and Chicago P.D.
Chicago Fire Season 1, Episode 23 (“Let Her Go”): Chicago P.D.‘s Backdoor Pilot
Plot: “Lt Casey must work with Voight and the Intelligence Unit, Shay grows increasingly excited about the prospect of motherhood, and everyone comes together to support the opening of Molly’s.”
Law & Order: SVU Season 15, Episode 15 (“Comic Perversion”) | Chicago P.D. Season 1, Episode 6 (“Conventions”)
SVU Plot: “A controversial, misogynistic comic makes jokes about sexual assault at one of his shows. When he is accused of rape, Benson is happy to arrest him, but Barba feels the case is weak.”
P.D. Plot: “New York’s SVU agents Fin and Rollins help track down a serial killer who rapes his victims; Burgess gets an opportunity to prove herself; Lindsay brings Halstead as her date to her high school reunion.”
Chicago Fire Season 2, Episode 20 (“A Dark Day”) | Chicago P.D. Season 1, Episode 12 (“8:30 PM”)
Fire Plot: “Firehouse 51 joins forces with the Chicago Police Department to combat a massive explosion that leaves the city in carnage and one of the crew missing.”
P.D. Plot: “As Voight and his team search for the bombers, they realize there might be more bombs set to detonate; Burgess’ niece fights for her life.”
Chicago Fire Season 3, Episode 7 (“Nobody Touches Anything”) | Law & Order: SVU Season 16, Episode 7 (“Chicago Crossover”) | Chicago P.D. Season 2, Episode 7 (“They’ll Have to Go Through Me”)
Fire Plot: “Severide returns from Las Vegas with a life-changing secret to share. Plus, the crew makes a disturbing discovery at the fire scene.”
SVU Plot: “Sgt Voight and Detectives Lindsay and Halstead work with Sgt Benson and the SVU as they investigate the roots of a child pornography site, but tension between Benson and Voight threatens the investigation.”
P.D. Plot: “The intelligence unit joins forces with detectives Rollins, Amaro, and Benson to bring down a child pornography ring once and for all.”
Chicago Fire Season 3, Episode 13 (“Three Bells”) | Chicago P.D. Season 2, Episode 13 (“A Little Devil Complex”)
Fire Plot: “More clues emerge about the fire that killed Shay, leading Severide to a former nemesis; Shay’s sister visits; Cruz is faced with a surprise; Boden tries to help his father.”
P.D. Plot: “Antonio and his sister talk to Elliot Gish about the person they think is responsible for the fire that killed Shay; Lindsay has second thoughts about the task force; Platt’s new, sunny demeanor results in curiosity.”
Chicago Fire Season 3, Episode 19 (“I Am the Apocalypse”): Chicago Med‘s Backdoor Pilot
Fire Plot: “Members of Firehouse 51 transport victims of a gas leak to nearby Chicago Med; an armed patient claiming to be carrying a deadly airborne disease forces Chicago Med into lockdown.”
Chicago Fire Season 3, Episode 21 (“We Called Her Jellybean”) | Chicago P.D. Season 2, Episode 20 (“The Number of Rats”) | Law & Order: SVU Season 16, Episode 20 (“Daydream Believer”)
Fire Plot: “An apartment fire with connections to rape and attempted murder leads to a joint investigation with the CPD and Sgt. Benson of the NYPD’s Special Victims Unit; Dawson risks her life during a call.”
P.D. Plot: “After arriving in Chicago to assist Voight and the team with a rape/murder case that has distinct similarities to a decade-old case from New York, Sgt. Benson asks Fin and Amaro to help; the prime suspect asks for a meeting with Lindsay.”
SVU Plot: “Members of the Chicago PD come to New York to assist the SVU in their pursuit of the prime suspect in a case of rape and murder that resembles a case from a decade ago. A kidnapping raises the stakes.”
Chicago Fire Season 4, Episode 10 (“The Beating Heart” | Chicago Med Season 1, Episode 5 (“Malignant”)| Chicago P.D. Season 3, Episode 10 (“Now I’m God”)
Fire Plot: “A member of Firehouse 51 is treated for life-threatening injuries; Cruz searches for Freddie; Mouch has a surprise for Trudy; Chili’s behavior worries Brett and Jimmy.”
Med Plot: “Rhodes and Zanetti race to save a member of Firehouse 51, April’s brother struggles during his first day at the hospital, and a woman saved from a burning building leads to a bigger mystery.”
P.D. Plot: “A doctor connected to Voight is investigated after four patients with chemo overdoses are sent to Chicago Med; Platt and Burgess work to clear Roman’s name.”
Chicago Fire Season 5, Episode 9 (“Some Make It, Some Don’t”) | Chicago P.D. Season 4, Episode 9 (“Don’t Bury This Case”)
Fire Plot: “Dawson and Casey face legal issues as they try to retain legal guardianship of Louie; Severide continues to look for a bone marrow procedure to help Anna; Brett opens up to Dawson.”
P.D. Plot: “Severide is brought in for questioning after it is discovered that his car has been involved in a deadly crash; Lindsay considers meeting her estranged father.”
Chicago P.D. Season 5, Episode 16 (“Profiles”) | Chicago Fire Season 6, Episode 13 (“Hiding Not Seeking”)
P.D. Plot: “A string of bombings is targeting members of the media; the team enlists Firehouse 51 to help examine the devices and prevent the next attack.”
Fire Plot: “Voight requests that Brett and Dawson go undercover, and Chief Boden unwillingly agrees; Zach and Kidd’s relationship hits an obstacle; Cruz struggles to express his true feelings for Brett.”
